Bitcoin block 955, 318 is being reported as the first known Stratum V2 block on mainnet, a small-looking milestone that could have outsized consequences for how mining power is organized.
- Block 955, 318: first known Stratum V2 block on mainnet
- Job Declaration: miner-side transaction selection in production
- Pool control: reduced, not gone
- Adoption: still the real grind
The event was discussed in an episode featuring Alejandro De La Torre, CEO of DMND_Sv2, and it comes down to a simple but important question: what happens when miners stop being passive order-takers and start shaping their own block templates?
That distinction matters. In Bitcoin mining, mining pools have traditionally decided which transactions make it into a candidate block. Miners provided hash power and accepted the pool’s template. Stratum V2 changes that arrangement by allowing miners to communicate more securely and, crucially, by introducing Job Declaration, which lets a miner build its own block template and propose it to the pool.
That is not total sovereignty. It is not a coup. But it is a real shift in leverage.
Bitcoin Magazine and CryptoBriefing both reported that the block was mined on June 25, 2026 and described it as the first known Stratum V2 block on mainnet. In practical terms, that means this was not a testnet dress rehearsal or a demo in a lab. It was a live block on the Bitcoin network, mined with Stratum V2’s Job Declaration feature in production.
That production detail is the whole point. A lot of crypto infrastructure looks brilliant right up until it has to survive real money, real uptime, and real industrial mess. Mainnet is where the theory gets punched in the face by firmware bugs, pool economics, and operational reality.
Job Declaration is the feature that changes the game. It allows the miner, rather than the pool, to select transactions and assemble the block template. The pool still validates the proof-of-work and still plays an important role, but it is no longer the sole author of block contents.
That matters for more than ideological purity. Transaction selection influences censorship resistance, fee capture, and block policy. Whoever gets to choose the transactions has meaningful control over what Bitcoin mining is actually doing, not just how much electricity it burns.
At the same time, Stratum V2 does not magically erase pool power. Pools can still validate work, and in some setups they can still reject a miner’s template. So the honest framing is not “miners now fully control blocks.” It is: miners get more autonomy, and that is a real improvement, but the pool is still part of the equation.
That nuance is important because Bitcoin mining remains heavily concentrated. According to the broader material around the protocol, major pools have joined the Stratum V2 Working Group, which is a good sign for coordination and possible adoption. But joining a working group is not the same thing as full deployment. A logo on a slide deck is not the same thing as software running in production across a fleet of machines that are chewing through megawatts.
Hardware and firmware are the other bottleneck. The practical path to Stratum V2 depends on miners, firmware developers, and pool operators all pulling in the same direction. Native support from products like Braiins OS+ and Auradine, along with bridging tools such as the SRI Translation Proxy for older equipment, are part of what makes adoption possible. The protocol can be elegant, the hardware stack usually isn’t.
Stratum V2 also improves mining communication itself. It uses modernized, encrypted transport, which helps reduce exposure to interception and tampering risks that can affect older mining communication setups. That may sound dry, but the translation is straightforward: fewer weak points in the plumbing, fewer chances for someone to mess with hashrate traffic. For anyone wanting a more technical breakdown, Stratum V2: Enhancing Bitcoin Mining Efficiency and is a useful primer.
There is also a business angle here, and it is not a small one. Better miner control over transaction selection could become more valuable as block subsidies decline and fee revenue matters more. But there are tradeoffs. Miners may want more control, yet they also need reliable payouts, lower operational friction, and pools that do not act like territorial little gatekeepers every time a protocol evolves.
The episode also references SLICE, DMND’s payout system, in comparison with FPPS, which stands for Full Pay Per Share. FPPS is common because it smooths income: miners are paid for shares submitted rather than waiting on the luck of finding a block. Any alternative has to compete with that stability. Miners may like sovereignty, but they also like paying the bills on time. Revolutionary ideals are nice, payroll is nicer.
There is a reason this milestone is getting attention. Bitcoin mining has long been one of the network’s most centralized pressure points. Pools are useful because they reduce variance and help smaller miners survive in a brutal business. But they also concentrate power over block construction. Stratum V2 aims to keep the good part of pooling while pushing some of that power back toward the miner.
That is the real tension here: decentralization versus convenience, autonomy versus coordination. Stratum V2 does not solve that conflict. It makes the tradeoff less lopsided.
The strongest reading of block 955, 318 is that it shows the architecture can work in production. The miner did not just receive a prebuilt template and nod politely. The Job Declaration flow let the miner select transactions and propose its own block template, which is exactly the kind of practical step that turns an abstract protocol upgrade into something real. For a longer-form discussion of the first major production milestone, The First Stratum V2 Block: What It Means for Bitcoin Mining lays out the mechanics clearly.
But one block is not a trend line. It is a proof point. A useful one, yes, but still a proof point. Broad adoption will depend on whether miners actually want the extra control, whether pools support it without playing obstructionist games, and whether firmware and hardware support are easy enough that operators do not shrug and stick with the old setup because it is familiar.
That is the part people often skip over in the hype cycle. Bitcoin is not improved by slogans. It is improved by boring infrastructure that quietly works. Stratum V2 is interesting precisely because it is not a meme coin fairy tale. It is plumbing. Better plumbing can change who holds power.
It can also change economics. If miners can choose transactions more directly, they may be better positioned to capture fee revenue and respond to policy pressure without relying as heavily on pool-level choices. That does not mean every miner will suddenly become a block-building sovereign. It means the system gives them more room to act like one.
For DMND and GoMining, this is a visible production milestone. For the rest of Bitcoin mining, it is a test case. If the setup proves reliable and profitable, more operators will follow. If it proves fiddly, expensive, or too awkward to integrate, it risks becoming another clever Bitcoin idea that never escaped the lab in any meaningful way. One public writeup framed that moment as Demand Pool mines first Stratum V2 block, marking historic, while a related breakdown on Bitcoin Mining Pool DMND Mines First Known Stratum V2 underscores how much attention this has drawn.
Either way, the signal is clear: mining protocol decentralization is no longer just a whitepaper exercise. It is being tested on mainnet, under real conditions, where the ugly little details always have the final say.
Key questions and takeaways
-
What happened with block 955, 318?
It was mined on June 25, 2026 and is being reported by Bitcoin Magazine and CryptoBriefing as the first known Stratum V2 block on mainnet. -
What is the big deal about Stratum V2?
Stratum V2 improves mining communication and gives miners more control over transaction selection through Job Declaration. That pushes some power away from pools and closer to the miner. -
Does Stratum V2 eliminate pool control?
No. Pools still validate work and can still influence or reject templates in some setups. This is a step toward miner autonomy, not total independence. -
Why does transaction selection matter?
Because it affects censorship resistance, fee capture, and block policy. Whoever chooses the transactions has real influence over how Bitcoin mining behaves. -
What still needs to happen for broader adoption?
More pool support, more firmware and hardware compatibility, and enough miner demand to make Stratum V2 worth deploying at scale instead of treating it like a niche experiment. -
Why does the payout model matter here?
Miners care about predictability as much as control. FPPS remains popular because it smooths revenue, so any alternative like SLICE has to prove it can compete on stability and practicality.
Useful links tied to the milestone include Alejandro De La Torre’s announcement on X, the DMND pool at dmnd.work, and the podcast and newsletter channels associated with Stephan Livera. The headline may be a single block, but the larger question is whether Bitcoin mining keeps moving toward more miner control or settles back into the comfortable gravity of pool dominance. For those tracking the broader rollout, there are also updates on DMND Launches First Stratum V2 Bitcoin Mining Pool and DMND Launches Stratum V2 Bitcoin Mining Pool as, plus the open-source route via Blitzpool, Non-Custodial Bitcoin Mining Pool.
There is also a useful community thread on the Bitcoin Mining Pool DMND Mines First Known Stratum V2 milestone, alongside the company’s own announcement, DMND Launches Stratum V2 Bitcoin Mining Pool as decentralization push gathers steam. In other words: the machinery is moving, but Bitcoin mining is still a game of hard incentives, ugly compromises, and occasional flashes of actual progress.
